..A secondary purpose was to compare activity levels of three groups of girls, those who played sports at three time points, those who dropped out, and those who did not participate in sports...

Validation and calibration of the Actical accelerometer in preschool children

Karin A PfeifferDepartment of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USAMed Sci Sports Exerc 38:152-7. 2006

..The Actical accelerometer is a promising tool for measurement of PA in young children. The purpose of this study was to calibrate and validate the Actical accelerometer for use with 3- to 5-yr-old children...

..The purpose of this study was to examine policies and characteristics of preschools and the extent to which they influence the physical activity of 3- to 5-year-old children during the preschool day...

Social and environmental factors associated with preschoolers' nonsedentary physical activity

..Studies of physical activity in young children are limited by the lack of valid and acceptable measures. The purpose of this study was to calibrate and validate the ActiGraph accelerometer for use with 3- to 5-year-old children...

Assessing preschool children's physical activity: the Observational System for Recording Physical Activity in children-preschool version

William H BrownDepartment of Educational Studies, University of South Carolina at Columbia, 29208, USARes Q Exerc Sport 77:167-76. 2006

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Physical activity among children attending preschools

Russell R PateDepartment of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina, USAPediatrics 114:1258-63. 2004

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Do physical activity facilities near schools affect physical activity in high school girls?